From 87e29cef828548c397692473683eebd9613b661c Mon Sep 17 00:00:00 2001
From: Matthias Melcher <fltk@matthiasm.com>
Date: Tue, 26 Jan 2016 22:20:15 +0000
Subject: Moving image drawing code into the driver system

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3-porting@11060 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
---
 .../Quartz/Fl_Quartz_Graphics_Driver_image.cxx     | 167 +++++++++++++++++++++
 1 file changed, 167 insertions(+)
 create mode 100644 src/drivers/Quartz/Fl_Quartz_Graphics_Driver_image.cxx

(limited to 'src/drivers/Quartz')

diff --git a/src/drivers/Quartz/Fl_Quartz_Graphics_Driver_image.cxx b/src/drivers/Quartz/Fl_Quartz_Graphics_Driver_image.cxx
new file mode 100644
index 000000000..87fcbc068
--- /dev/null
+++ b/src/drivers/Quartz/Fl_Quartz_Graphics_Driver_image.cxx
@@ -0,0 +1,167 @@
+//
+// "$Id$"
+//
+// MacOS image drawing code for the Fast Light Tool Kit (FLTK).
+//
+// Copyright 1998-2012 by Bill Spitzak and others.
+//
+// This library is free software. Distribution and use rights are outlined in
+// the file "COPYING" which should have been included with this file.  If this
+// file is missing or damaged, see the license at:
+//
+//     http://www.fltk.org/COPYING.php
+//
+// Please report all bugs and problems on the following page:
+//
+//     http://www.fltk.org/str.php
+//
+
+////////////////////////////////////////////////////////////////
+
+#include <config.h>
+#include <FL/Fl.H>
+#include <FL/fl_draw.H>
+#include <FL/Fl_Printer.H>
+#include <FL/x.H>
+
+#define MAXBUFFER 0x40000 // 256k
+
+static void dataReleaseCB(void *info, const void *data, size_t size)
+{
+  delete[] (uchar *)data;
+}
+
+/*
+ * draw an image based on the input parameters
+ *
+ * buf:       image source data
+ * X, Y:      position (in buffer?!)
+ * W, H:      size of picture (in pixel?)
+ * delta:     distance from pixel to pixel in buf in bytes
+ * linedelta: distance from line to line in buf in bytes
+ * mono:      if set, pixel is one byte - if zero, pixel is 3 byte
+ * cb:        callback to copy image data into (RGB?) buffer
+ *   buf:       pointer to first byte in image source
+ *   x, y:      position in buffer
+ *   w:         width (in bytes?)
+ *   dst:       destination buffer
+ * userdata:  ?
+ */
+static void innards(const uchar *buf, int X, int Y, int W, int H,
+		    int delta, int linedelta, int mono,
+		    Fl_Draw_Image_Cb cb, void* userdata)
+{
+  if (!linedelta) linedelta = W*delta;
+
+  const void *array = buf;
+  uchar *tmpBuf = 0;
+  if (cb || Fl_Surface_Device::surface() != Fl_Display_Device::display_device()) {
+    tmpBuf = new uchar[ H*W*delta ];
+    if (cb) {
+      for (int i=0; i<H; i++) {
+	cb(userdata, 0, i, W, tmpBuf+i*W*delta);
+      }
+    } else {
+      uchar *p = tmpBuf;
+      for (int i=0; i<H; i++) {
+	memcpy(p, buf+i*linedelta, W*delta);
+	p += W*delta;
+	}
+    }
+    array = (void*)tmpBuf;
+    linedelta = W*delta;
+  }
+  // create an image context
+  CGColorSpaceRef   lut = 0;
+  if (delta<=2) 
+    lut = CGColorSpaceCreateDeviceGray();
+  else
+    lut = CGColorSpaceCreateDeviceRGB();
+  // a release callback is necessary when the fl_gc is a print context because the image data
+  // must be kept until the page is closed. Thus tmpBuf can't be deleted here. It's too early.
+  CGDataProviderRef src = CGDataProviderCreateWithData( 0L, array, linedelta*H, 
+						       tmpBuf ? dataReleaseCB : NULL
+						       );
+  CGImageRef        img = CGImageCreate( W, H, 8, 8*delta, linedelta,
+                            lut, delta&1?kCGImageAlphaNone:kCGImageAlphaNoneSkipLast,
+                            //lut, delta&1?kCGImageAlphaNone:kCGImageAlphaLast,
+                            src, 0L, false, kCGRenderingIntentDefault);
+  // draw the image into the destination context
+  if (img) {
+    CGRect rect = CGRectMake( X, Y,  W, H);
+    Fl_X::q_begin_image(rect, 0, 0, W, H);
+    CGContextDrawImage(fl_gc, rect, img);
+    Fl_X::q_end_image();
+    // release all allocated resources
+    CGImageRelease(img);
+  }
+  CGColorSpaceRelease(lut);
+  CGDataProviderRelease(src);
+  if (img) return; // else fall through to slow mode
+  // following the very save (and very slow) way to write the image into the give port
+  CGContextSetShouldAntialias(fl_gc, false);
+  if ( cb )
+  {
+    uchar *tmpBuf = new uchar[ W*4 ];
+    for ( int i=0; i<H; i++ )
+    {
+      uchar *src = tmpBuf;
+      cb( userdata, 0, i, W, tmpBuf );
+      for ( int j=0; j<W; j++ )
+      {
+        if ( mono )
+          { fl_color( src[0], src[0], src[0] ); }
+        else
+          { fl_color( src[0], src[1], src[2] ); }
+        CGContextMoveToPoint(fl_gc, X+j, Y+i);
+        CGContextAddLineToPoint(fl_gc, X+j, Y+i);
+        CGContextStrokePath(fl_gc);
+        src+=delta;
+      }
+    }
+    delete[] tmpBuf;
+  }
+  else
+  {
+    for ( int i=0; i<H; i++ )
+    {
+      const uchar *src = buf+i*linedelta;
+      for ( int j=0; j<W; j++ )
+      {
+        if ( mono )
+          fl_color( src[0], src[0], src[0] );
+        else
+          fl_color( src[0], src[1], src[2] );
+        CGContextMoveToPoint(fl_gc, X+j, Y+i);
+        CGContextAddLineToPoint(fl_gc, X+j, Y+i);
+        CGContextStrokePath(fl_gc);
+        src += delta;
+      }
+    }
+  }
+  CGContextSetShouldAntialias(fl_gc, true);
+}
+
+void Fl_Quartz_Graphics_Driver::draw_image(const uchar* buf, int x, int y, int w, int h, int d, int l){
+  innards(buf,x,y,w,h,d,l,(d<3&&d>-3),0,0);
+}
+void Fl_Quartz_Graphics_Driver::draw_image(Fl_Draw_Image_Cb cb, void* data,
+		   int x, int y, int w, int h,int d) {
+  innards(0,x,y,w,h,d,0,(d<3&&d>-3),cb,data);
+}
+void Fl_Quartz_Graphics_Driver::draw_image_mono(const uchar* buf, int x, int y, int w, int h, int d, int l){
+  innards(buf,x,y,w,h,d,l,1,0,0);
+}
+void Fl_Quartz_Graphics_Driver::draw_image_mono(Fl_Draw_Image_Cb cb, void* data,
+		   int x, int y, int w, int h,int d) {
+  innards(0,x,y,w,h,d,0,1,cb,data);
+}
+
+void fl_rectf(int x, int y, int w, int h, uchar r, uchar g, uchar b) {
+  fl_color(r,g,b);
+  fl_rectf(x,y,w,h);
+}
+
+//
+// End of "$Id$".
+//
-- 
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